[xsl] Sorting and Paging in one pass with XSLT 2

[Kyle Himmerick <kyle@xxxxxxxxxxxx>]

Hello All,

I am trying to use some of the new XSLT 2 functionality to improve my 
sorting and paging performance.

Ideally I would be able to sort and splice a large document tree in one 
pass.

So sort the tree and put x # of records in each result document.

Here's a pseudo of what I'm trying to do:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
xmlns:fo="http://www.w3.org/1999/XSL/Format";>
  <xsl:param name="perPage" select="number('10')"/>

  <xsl:template match="result">
      <xsl:for-each select="row">
          <xsl:sort select="lname"/>
          <xsl:sort select="fname"/>
          <xsl:variable name="page" 
select="ceiling(position()/$perPage)"/>
          <xsl:result-document href="out{$page}.xml">
              <result>
                  <xsl:copy-of select="."/>
              </result>
          </xsl:result-document>
      </xsl:for-each>
  </xsl:template>
</xsl:stylesheet>

Obviously this won't work as it would try create a new result-document 
on each pass.  Whereas I need the first $perPage rows to go into the 
same result-document.

I was hoping to find a way to use the grouping functionality in xslt 2.  
Possibly grouping records by their page and then iterate through 
creating a new result-document for each group of records.  I couldn't 
find a way to do this with one pass through the document, which is what 
I'm trying to stick with since I can potentially have very large 
incoming xml.

Any ideas or suggestions for implementing an efficient method of sorting 
and then paging the results?

Best Regards,
Kyle